Now showing items 1-3 of 3

    • Optimal trajectory control for LLC resonant converter for LED PWM dimming 

      Virginia Polytechnic Institute and State University; Lee, Fred C.; Ji, Shu; Feng, Weiyi (United States Patent and Trademark Office, 2016-03-01)
      Pulse width modulation is provided for controlling a resonant power converter, particularly for dimming of light emitting diode arrays without loss of efficiency. Dynamic oscillation due to the beginning of a pulse width ...
    • Optimal trajectory control for LLC resonant converter for soft start-up 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Feng, Weiyi (United States Patent and Trademark Office, 2016-04-19)
      By setting switching instants of a switching circuit of a resonant power converter based on current in a resonant circuit reaching a current limit of a current limitation band, soft start-up of the power converter can be ...
    • Using power fingerprinting (PFP) to monitor the integrity and enhance security of computer based systems 

      Virginia Tech Intellectual Properties, Inc.; Reed, Jeffrey H.; Aguayo Gonzalez, Carlos R. (United States Patent and Trademark Office, 2016-02-16)
      Procedures are described for enhancing target system execution integrity determined by power fingerprinting (PFP): by integrating PFP into the detection phase of comprehensive defense-in-depth security; by deploying a ...